Yarn winding and analogous machines



Jan. 14, 1941. w. SHAW 2,228,710

YARN WINDING AND ANALOGOUS MACHINES Filed Feb. 23,1933 v a v 2 5 6; P ra 8 5'] I167; VTZIJ T manim l zz 1 Patented Jan. 14, 1941 YARN WINDINGAND ANALOGOUS MACHINES Walter Shaw, Huddersfield, England, assignor toBalstcnbach & 00., Wuppertal-Wechlinghausen, GermanyApplication'Febrnary 23, 1938, Serial No. 192,108- In Great BritainMarch 2, 1937 8 Claims. (cl. 242-45) My invention in or relating to yarnwinding and analogous machines has particular reference to machines forwinding pirns of artificial silk.

In these machines it is essential, as is well. known, to controlaccurately the tension imposedupon the yarn. It the package from whichthe yarn supply is being taken is in the form of a rotatably-mountedbobbin, and such. bobbin together with its yarn mass is of relativelyconsiderable weight. it may and frequently does occur that the eiiortrequired to be exerted by the yarn to rotate the bobbin imposes agreater tension on the yarn than is desirable or even renders itimpossible for the yarn to pull around the bobbin.

When, therefore, very fine yarns are being wound at high speed from arotatably-mounted bobbin it, is necessary to provide means for drivingor rotating the bobbin independently of the the pull of the yarn. It isnecessary, moreover, that provision be made for varying the speed ofrotation of the bobbin in synchronism with that or the winding spindle,so that the tension on the yarn will be maintained constant. Further itis necessary to make provision whereby in the event of the rotation o!the winding spindle being suddenly stopped, an adequate brake will beapplied to the supply bobbin to bring it quickly to rest and preventover-running.

The object of the present invention is to provide mechanism by means ofwhich the desiderata referred to will be attained, together with otheradvantages which will be mentioned later.

The invention is characterized in that a member controlled by movementsof an angularlymovable and adiustably-loaded compensator arm, over aguide or guides on which the yarn passes on its way from a rotatablesupply bobbin to the winding spindle, is arranged to control a drive forthe supply bobbin obtained from the winding spindle or from a shaftdriving said spindle, the said drive being at all times effected againsta brake load and an additional brake load being brought into action bythe operation 01 the compensator arm if, on sudden stoppage of thewinding spindle, the constantly-acting brake load does not sufilce,owing to the momentum of the supply bobbin, to bring said bobbin quicklyto rest when the drive ceases.

The accompanying drawing, shows in Fig. 1. a diagrammatic sketch of awinding unit embodying the invention and in Fig. 2 a sectional elevationon an enlarged scale of the particular form or construction of clutchand brake arrangement shown in Fig. 1;

Fig. 3 is a plan View or the compensator arm mounting. Referring to thedrawing a represents a. wind-- ing spindle, rotated and reciprocatedaxially by known means housed in a casing b and driven by 5 shaft 0 andbevels d and e from a shaft f which receives motion from any convenientsource.

' The supply bobbin from which the yarn g to be wound is drawn isindicated at h. The yarn passes from this supply bobbin to the winding'spindle over a guide member 2' on an angularlymovable compensator arm 1,thence beneath a pulley Ia and over a second guide member m on thecompensator arm to the winding spindle. The pulley k is carried by anarm k connected in the illustrated embodiment to a lever k which isarranged, in known manner to actuate meansto. arrest quickly therotation of the winding spindle ii" the yarn supply should fail and thuspermit the arm k to swing towards the left in Fig. 1. Alternatively thepulley It might be carried by a. fixed part.

The guide members i and m are, it will. be noted disposed at twodifferent points in the length oi the compensator arm 1', the purpose ofthis arrangement being described later.

The boss 1' of the compensator arm is fixed upon a spindle 11 carried inhearings in a suitable bracket 0. To the boss?" there is secured one endof 'a spring 11' coiled about the spindle n and having its opposite end11 fashioned as a radial finger adapted to be registered in any oneof aseries or open-ended slots n spaced circumferentially around the annularflange n of a disc 1: fast on the spindle n. By varying the position ofanchorage of the end 71 of the spring around discn so can the action ofthe spring to resist angular movement of the compensator arm be varied.The boss 7" of the compensator arm has also connected to it one end of aspring n. the other end or which is anchored to a part 72' carried bythe bracket 0. The boss 9" is further connected by a rod p with one armof an angle lever p pivoted at p to a bracket :1 The other arm or thelever p ls arranged to bear against a boss r slidable longitudinallyupon a sleeve 1'', mounted rotatably aboutthe spindle r for the supplybobbin h which spindle is iournalled in the bracket p Between the boss rand a pulley r fast on the sleeve 1- there is disposed a coiled v spring1 which acts to move the boss in a direction contrary to that in whichit is moved by the lever 11 The pulley 1' receives motion from anysuitable source at, preferably a relatively high speed, co-ordinated tothat of the winding spindle 5 and, in the present instance. isshown asbeing driven by belt from a pulley or shaft I.

Projecting radially inwards from the boss 1',

through slots in the sleeve r are pins r which 5 engage between discs rand r" slidable upon the spindle r Between the disc r and a pressureplate a there is disposed a springs. The plate s is adapted to exertpressure against a. series of 10 discs s alternate ones of which aresplined on the spindle r and the intervening ones carried by pins tprojecting horizontally from a part t fast with the sleeve r. Itfollows, therefore, that the proportion of the speed of rotation of thesleeve 1" imparted to the spindle'r of the supply bobbin depends uponthe pressure with which the discs 5 are pressed together by the plate sunder the action of the spring a and disc r".

Between the disc 1 and a second pressure plate 11 there is disposed aspring u. The plate u is adapted to exert pressure against a series ofdiscs u alternate ones of which are splined on the spindle 1- Whilst theintervening ones are carried by pins 1) projecting horizontally from apart v fastv with the bracket P It follows-therefore. that when theplate u is caused to exert pressure against the discs u a braking actionis exerted upon the spindle r by reason of the discs keyed upon it beingpressed against the stationary discs carried by the pins v.

The spring p is so designed in strength and arranged in its angularsetting or direction of pulls as to balance the effects of the springsr, s. and

n in such a manner that when the spring 11' is free there is little orno upward pull on the compe'nsator arm 7'. The arm is thus capable ofresting in any position between the extremities of its permissiblemovement. The very smallest 40 amount of tension can thus be applied tothe sator arm is determined according to the tension it is desired toimpose upon the yarn. In this normal running position of .the arm thelever p, the spring s exerts sufllcient pressure on the clutch discs sto cause the spindle r of the supply bobbin to be driven at the speedrequired to maintain constant the tension on the yarn. Any variation inthe tension on the yarn-tends to cause a change in the angular positionof the compensator arm and thus to vary the driving action of the clutchdiscs s. It is believed to be apparent that the tension of the spring sis determined by the pressure imposed thereupon by the spring 1' bycontact of the pins r with the dis r. During the time the pins r areeffected the tension of the spring u will be sufficient to maintain thediscs u in such frictional contact whereby there is maintained at alltimes a brake load on the spindle.

If, for any reason such as quick stoppage of the winding spindle, thereis a cessation of tension on the yarn, the spring 11 acts to move. thecompensator arm 7' to an angular position in which the action of thespring r is overcome to an extent sufficient to increase the brakingaction of the series of discs u constituting the brake for the spindle rand give an additional brake load to bring the bobbin quickly to rest iithe constantly acting brake load referred to above does not suflice. 'Itis believed to be apparent that this increased braking action of thediscs u results from the contact of the fingers, r with the discs r asthe rim r is moved against the tension of the spring 1* asv the rod 1)imposes pull upon the angle lever p As the diameter of the yarn mass onthe supply bobbin decreases the bobbin obviously requires 5 to be drivenfaster, but at the same time its weight is decreasing, so that theeffort required to drive it remains substantially const nt.- The resultof thisiis that the angular position of the compensator arm 7' remainsmore or less constant 10 from commencement to finish of a supply bobbin.An important advantage of this is that the compensator arm can be maderelatively short and consequently lighter in weight and quicker inaction all of which tends towards attainment 5 of a more uniform yarntension Attention was drawn hereinbefore to the fact that the yarn, onleaving the supply bobbin. is led through a guide i disposed between theends, of the compensator arm and after passing about 20 the pulley k isled through a second guide m at the extremity of the compensator arm.This arrangement has an important advantage in that the tension isapplied to the yarn gradually and the "draw" on the yarn as it leavesthe supply 25 bobbin is very light. A further important advantage isthat by the employment of the two separated guides t and m the tendencytowards vibration of the compensator arm is checked.

Although I have shown multi-disc friction clutch devices fortransmitting drive to the spindie of the supply bobbin and for applyingbraking action to the said spindle in the event of the tension on theyarn ceasing. I wish it to be understood that so far as the drive isconcerned I am 35 by no means limited to the use of such devices.Moreover, I do not limit myself to the provision of two guides m and ion the compensator arm.

In some cases only the guide m at the extremity of the arm may berequired. 4.

Whilst having been specially designed for application to'yarn-windingmachines the mechanism constituting the invention may be applied toanalogous machines such for instance as warping machines. (5

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent is:

i. In a yarn winding or analogous machine, a rotatable supply bobbin. awinding spindle, and 50 means for driving said bobbin and windingspindie, the combination including a movable compensator arm. a guide onsaid arm intermediate the ends thereof through which is first disposedthe material leaving the bobbin. a fixed guide 55 for such materialafter leaving the guide on the compensator arm, a second guide on thecompensator arm at the extremity thereof for the material after leavingthe fixed guide. and means under control of the compensator arm forregu- 60 lating the rotation of the bobbin.

2. In a yarn winding machine, a winding spindie. a rotatable supplybobbin, a bobbin spindle.

a sleeve surrounding the bobbin spindle, friction discs within thesleeve alternately keyed to 65 the 'bobbin'spindle and to the sleeve, aboss slidable on the sleeve and having a part extending within thesleeve, said sleeve being slotted for passage of such part to permitsliding movement of the boss along the sleeve, a pressure disc 70carried by the bobbin spindle to contact the in wardly disposed part ofthe sleeve, an expansion spring within the sleeve and surrounding thespindle and interposed between the friction discs and the last nameddisc, means carried by 1 means under control of the tension of thematerial drawn from the bobbinspindle for controlling such movement ofthe boss and there-.

by controlling the driving contact between the friction discs, and meansfor rotating the sleeve.

3. In a yarn winding machine, a winding spindle, a rotatable supplybobbin, a bobbin spindle, a sleeve surrounding the bobbin spindle,friction discs within the sleeve alternatelykeyed to the bobbin spindleand to the sleeve. 9. boss slidable on the sleeve and having a partextending within the sleeve, said sleeve being slotted for passage ofsuch part to permit sliding movement of the boss along the sleeve, apressure disc carried by the bobbin spindle to contact the inwardlydisposed part of the sleeve, an expansion spring within the sleeve andsurrounding the spindle and interposed between the friction discs andthe last named disc, means carried by the sleeve for constantly urgingthe boss and the part carried thereby toward the friction discs. meansunder control of the tension of the material drawn from the bobbinspindle for controlling such movement of the boss and therebycontrolling the driving contact between the friction discs, means forrotating the sleeve, said sleeve having an open end; a fixed partextending within the sleeve, friction braking discs alternately keyed tothe bobbin spindle and to said fixed part, a

second pressure disc carried by the bobbin spin-- die adjacent to thefirst named pressure disc, the inwardly disposed part of the bossextending between the two pressure discs, an expansible springsurrounding the bobbin spindle and interposed between the secondpressure disc and the friction braking discs, said spring operating tonormally maintain the friction braking discs in contact, movement of theboss along the sleeve in a direction away from the first named frictiondiscs increasing the braking action of said braking discs.

4. In combination, a spindle, a sleeve surrounding said spindle. a discclutch within one end portion of the sleeve comprising discs alternatelykeyed to the spindle and to the sleeve, one end of the sleeve beingopen, a fixed part at said open end of the sleeve, a friction brakewithin the sleeve and coacting with said fixed part, said friction brakecomprising discs alternately keyed to the spindle and to the fixed part,two pressure discs carried by the spindle between the clutch and brake,a member slidable upon the sleeve, an inwardly disposed part carried bysaid member extending within the sleeve and between the pressure discs,said sleeve having a slot through which said part of the member passes,an expansible spring interposed between one of the pressure discs andthe friction clutch, an expansible member surrounding the spindle andinterposed between the second friction disc and the friction brake,means for rotating the sleeve, means for constantly urging the member ina direction toward the friction clutch. and means for controlling suchmovement of the member.

5. In combination, a spindle, a sleeve surrounding said spindle, a discclutch within one end portion of the sleeve comprising discs alternatelykeyed to the spindle and to the sleeve, one end of the sleeve beingopen, a fixed part at said open end of the sleeve, a friction brakewithin the sleeve and coacting with said fixed part, said friction brakecomprising discs alternately keyed to the spindle and to the fixed part,two pressure discs carried by the spindle between the clutch and brake,a member slidable upon the sleeve, an inwardly disposed part carried bysaid member extending within the sleeve and between the pressure discs,said sleeve having a slot through which said part of the member passes,an expansible spring interposed between one 'of the pressure discs andthe friction clutch, an expansible member surrounding the spindle andinterposed between the second friction disc and the friction brake,means for rotating the sleeve, means for constantly urging the member ina direction toward the friction clutch, and means '16 for controllingsuch movement of the member, said last named means also operating tomove the member toward the brake. I

6. m. combination, a spindle, a; sleeve sur- I rounding said spindle, adisc clutch within one end portion of the sleeve comprising discsalternately keyed to the spindle studio the sleeve, one

end of the sleeve being open, a fixed part at said open end of thesleeve, a friction brake within the sleeve and coacting withsaid fixedpart, said friction brake comprising discs alternately keyed to thespindle and .to the fixed part, two

pressure discs carried by the spindle between the clutch and brake, amember slidable upon the sleeve, an inwardly disposed part carried bysaid member extending within the sleeve and between the pressure discs,said .s'leeve having a slot through which said part of the memberpasses, an expansible spring interposed between one of the pressurediscs and the friction clutch, an expansible member surrounding thespindle and interposed between the second friction, disc and thefriction brake, means for rotating the sleeve, means for. constantlyurging the member in a direction toward the friction clutch, and amovable lever supported in position for contact with the member forcontrolling the movement of the member toward the clutch or to move saidmember toward the brake.

'7'. In combination, a spindle, a sleeve surrounding said spindle. adisc clutch within one end portion of the sleeve comprising discsalternately keyed to the spindle and to the sleeve, one end of thesleeve being open. a fixed partat said open end of the sleeve, afriction brake within the sleeve and coacting with said fixed part, saidfriction brake comprising discs alternately keyed to the spindle and tothe fixed part, two pressure discs carried by the spindle between theclutch and brake, a member slidable upon the sleeve, an inwardlydisposed part carried by said member extending within the sleeve andbetween the pressure discs, said sleeve having a slot through which saidpart of the member passes, an expanslble spring interposed between oneof the pressure discs and the friction clutch, an expansible membersurrounding the spindle and interposed -between the second friction discand the friction brake, means for rotating the sleeve, means forconstantly urging,

end portion of the sleeve comprising discs alternately keyed to thespindle and to the sleeve,

one end of the sleeve being open, a fixed part at said open end of thesleeve, a friction brake within the sleeve and coacting with said fixedpart, said friction brake comprising discs alternately keyed to thespindle and to the fixed part, two pressure discs carried by the spindlebetween the clutch and brake, a member slidable upon the sleeve. aninwardly disposed part'carried by said member extending within thesleeve and between the pressure discs, said sleeve having a slot throughwhich said part of the member passes, an expansible spring interposedbetween one oi the pressure discs and the friction clutch,

an expansible member surrounding the spindle and interposed between thesecond friction disc and the friction brake, means for rotating thesleeve. means for constantly urging the member in a direction toward thefriction clutch, a movable lever supDOrted in position for contact withthe member for controlling the movement oi. the

' member toward the clutch or to move said mem-

